Eye on the Ball

Bethanie Mattek-Sands of the US hits a return against Caroline Wozniacki of Denmark during their women's singles session 4 match on day three of the Hopman Cup tennis tournament in Perth.

Bethanie Mattek-Sands of the US hits a return against Caroline Wozniacki of Denmark during their women's singles session 4 match on day three of the Hopman Cup tennis tournament in Perth. (TONY ASHBY/AFP/Getty Images)

Bethanie Mattek-Sands of the US hits a return against Caroline Wozniacki of Denmark during their women's singles session 4 match on day three of the Hopman Cup tennis tournament in Perth.